Book/Report

FZJ-2017-02559

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Calculations on the temperature sensitive intensity ratio of the he-ii 4686 a line and its neighbouring continuum

Berg, H. F.FZJ* ; Tondello, G.

1964
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/14096

Report No.: Juel-0182-PP

Abstract: H.R. Griem provides the calculation of this intensity ratio from 80 000° K to higher temperatures. The present calculation extends the method to lower temperatures,where the continua of both the neutral and ionized atoms have to be considered. In this low temperature domain the temperature sensitivity of the intensity ratio is much increased over that ofthe high temperature range. The absolute intensities of the continua due to the neutral and ionized atoms are presented separatly. Finally the intensity ratio of the He II-4686 A line and its neighbouring continuum is plotted and taken out to higher temperatures sufficiently to provide someoverlapping points with Griem's calculation. Deviations in the states of the ionized atom from the thermal population were considered. For the partition function cutoff the reduced ionization potential from Unsöld's formula was used.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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Database coverage:

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